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General Climbing Discussion

Topic Date User

Arapiles Bore Dry but business as usual 28-Sep-2008 At 7:06:16 AM Capt_mulch

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Bores that stop yielding water don't necessarily run dry due to lack of ground water. Depending on what the ground water is like (i.e. lots of Calcium and Magnesium in it - BTW - is the water 'hard' at the Pines bore?), they can harden up over time and become unproductive, especially if it is a high use bore where the recharge rate is slow (it takes time for the surrounding ground water to seep back into the area around the bottom of the bore hole where the pump is). Sometimes bores can be 'blown out', to get them productive again, or just drilling a new bore can be the answer. I had one put in on the North Coast of NSW about ten years ago, and it cost $75 a metre to drill, so depending on the depth they can be cheap or expensive (my bore was 90 metres deep - my parents one in Sydney is 3 metres deep). Also, bores need to be managed really well to maintain their productivity - when I put my bore in I spent a lot of time working out what the recharge rate was, how much I could pump each day, and how often I could pump. I then closely monitored the flow rate and yield over time. I doubt if the bore at The Pines gets that much attention. Sounds like they need a new bore hole. ($5000 feasibility study??? You could have done a lot of drilling for that, and still had money left over for beers afterwards).